✓ Effortless Math · Free Tool

Exponential Growth & Decay Calculator

Model exponential growth or decay — continuous or periodic — to get the final amount, total change, growth factor, doubling time or half-life, and a graph.

A = A₀·ekt  or  A = A₀·(1 + r)t
initial A₀ rate (% per period) time t

Enter the starting amount, the growth rate as a percent (use a negative rate for decay), and the time.

Results

Amount after time t
—
—
Final amount A(t)
—
Total change
—
Growth factor
—
Doubling time
—

Graph

A(t)at time t

Step-by-step